<!DOCTYPE HTML>
<html>
<!--
https://bugzilla.mozilla.org/show_bug.cgi?id=804970
-->
<head>
  <title>Test for dynamic changes to CSS 'vh', 'vw', 'vmin', and 'vmax' units</title>
  <script type="application/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
</head>
<body>
<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=804970">Mozilla Bug 804970</a>
<iframe id="iframe" src="viewport_units_iframe.html"></iframe>
<pre id="test">
<script type="application/javascript">

/** Test for CSS vh/vw/vmin/vmax units **/

function px_to_num(str)
{
    return Number(String(str).match(/^([\d.]+)px$/)[1]);
}

function width(elt)
{
    return px_to_num(elt.ownerDocument.defaultView.getComputedStyle(elt, "").width);
}

SimpleTest.waitForExplicitFinish();

function run() {
    var iframe = document.getElementById("iframe");
    var idoc = iframe.contentDocument;
    var vh = idoc.getElementById("vh");
    var vw = idoc.getElementById("vw");
    var vmin = idoc.getElementById("vmin");
    var vmax = idoc.getElementById("vmax");

    iframe.style.width = "100px";
    iframe.style.height = "250px";
    is(width(vh), 250, "vh should be 250px");
    is(width(vw), 100, "vw should be 100px");
    is(width(vmin), 100, "vmin should be 100px");
    is(width(vmax), 250, "vmax should be 250px");

    iframe.style.width = "300px";
    is(width(vh), 250, "vh should be 250px");
    is(width(vw), 300, "vw should be 300px");
    is(width(vmin), 250, "vmin should be 250px");
    is(width(vmax), 300, "vmax should be 300px");

    iframe.style.height = "200px";
    is(width(vh), 200, "vh should be 200px");
    is(width(vw), 300, "vw should be 300px");
    is(width(vmin), 200, "vmin should be 200px");
    is(width(vmax), 300, "vmax should be 300px");

    SimpleTest.finish();
}

window.addEventListener("load", run, false);

</script>
</pre>
</body>
</html>
